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托福听力练习-科学美国人60秒:奇特黑洞旋转速度

2017-02-11 16:19:00来源：科学美国人60秒

点击查看>>科学美国人60秒音频：奇特黑洞旋转速度

　　科学美国人60秒中英文翻译：奇特黑洞旋转速度

　　科学美国人60秒英文文本

　　Two remarkable things about a giant black hole called RX J1131 at the center of a galaxy some 6 billion light years away.

　　One:it's the farthest black hole to have its spin measured.

　　Two:it's spinning at half the speed of light.

　　That's according to a report in the journal Nature.

　　Astronomers have wondered, do large black holes grow gradually via steady intake of material; or quickly, for example, in a merger with another black hole during a galactic collision.

　　Spin offers clues.

　　If the merger idea is correct, lots of new material flowing in a single direction feeds a black hole, driving the spin faster one way.

　　But a black hole that ate small meals from different directions would receive tiny pushes that cancel each other, and leave the black hole spinning slowly.

　　The half-the-speed-of-light-fantastic being tripped by this newly analyzed black hole thus suggests it grew by digesting another black hole in a galaxy merger.

　　Our own Milky Way's black hole could be in for a similar fate when we collide with our neighbor, the Andromeda Galaxy.

　　Relax, it's not for another four billion years.

　　中文翻译请点击下一页

本文关键字: 托福听力练习 科学美国人60秒

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